Increase ONLYOFFICE maximum upload size

We increased the max upload size on the Nextcloud Ingress, but we haven't done this on the ONLYOFFICE ingress. This results in a rather low max size for image uploads to the ONLYOFFICE documents. People have tried pasted a JPEG of 2 MB, but it was ignored. The error is "No image uploaded"

The fix: Add this annotation: nginx.ingress.kubernetes.io/proxy-body-size: 100M

Maybe 100M is a bit too much. Maybe 10M will do?